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authorLi Hong <lihong.hi@gmail.com>2010-04-06 00:54:11 +0800
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-05-10 11:32:30 +0900
commit41c88bd74d372db5102996a4ea6167a725c24b5e (patch)
tree98b8e208d41f7760458e82569e297843415bbe7d /fs/nilfs2/super.c
parentaaed1d5bfac459ead9aaad324e7fe3326250f50a (diff)
nilfs2: cleanup multi kmem_cache_{create,destroy} code
This cleanup patch gives several improvements: - Moving all kmem_cache_{create_destroy} calls into one place, which removes some small function calls, cleans up error check code and clarify the logic. - Mark all initial code in __init section. - Remove some very obvious comments. - Adjust some declarations. - Fix some space-tab issues. Signed-off-by: Li Hong <lihong.hi@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/super.c')
-rw-r--r--fs/nilfs2/super.c134
1 files changed, 74 insertions, 60 deletions
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 0b1758bf0726..5a08c82e7e25 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -67,6 +67,11 @@ MODULE_DESCRIPTION("A New Implementation of the Log-structured Filesystem "
"(NILFS)");
MODULE_LICENSE("GPL");
+struct kmem_cache *nilfs_inode_cachep;
+struct kmem_cache *nilfs_transaction_cachep;
+struct kmem_cache *nilfs_segbuf_cachep;
+struct kmem_cache *nilfs_btree_path_cache;
+
static int nilfs_remount(struct super_block *sb, int *flags, char *data);
/**
@@ -129,7 +134,6 @@ void nilfs_warning(struct super_block *sb, const char *function,
va_end(args);
}
-static struct kmem_cache *nilfs_inode_cachep;
struct inode *nilfs_alloc_inode_common(struct the_nilfs *nilfs)
{
@@ -155,34 +159,6 @@ void nilfs_destroy_inode(struct inode *inode)
kmem_cache_free(nilfs_inode_cachep, NILFS_I(inode));
}
-static void init_once(void *obj)
-{
- struct nilfs_inode_info *ii = obj;
-
- INIT_LIST_HEAD(&ii->i_dirty);
-#ifdef CONFIG_NILFS_XATTR
- init_rwsem(&ii->xattr_sem);
-#endif
- nilfs_btnode_cache_init_once(&ii->i_btnode_cache);
- ii->i_bmap = (struct nilfs_bmap *)&ii->i_bmap_union;
- inode_init_once(&ii->vfs_inode);
-}
-
-static int nilfs_init_inode_cache(void)
-{
- nilfs_inode_cachep = kmem_cache_create("nilfs2_inode_cache",
- sizeof(struct nilfs_inode_info),
- 0, SLAB_RECLAIM_ACCOUNT,
- init_once);
-
- return (nilfs_inode_cachep == NULL) ? -ENOMEM : 0;
-}
-
-static inline void nilfs_destroy_inode_cache(void)
-{
- kmem_cache_destroy(nilfs_inode_cachep);
-}
-
static void nilfs_clear_inode(struct inode *inode)
{
struct nilfs_inode_info *ii = NILFS_I(inode);
@@ -1139,54 +1115,92 @@ struct file_system_type nilfs_fs_type = {
.fs_flags = FS_REQUIRES_DEV,
};
-static int __init init_nilfs_fs(void)
+static void nilfs_inode_init_once(void *obj)
{
- int err;
-
- err = nilfs_init_inode_cache();
- if (err)
- goto failed;
+ struct nilfs_inode_info *ii = obj;
- err = nilfs_init_transaction_cache();
- if (err)
- goto failed_inode_cache;
+ INIT_LIST_HEAD(&ii->i_dirty);
+#ifdef CONFIG_NILFS_XATTR
+ init_rwsem(&ii->xattr_sem);
+#endif
+ nilfs_btnode_cache_init_once(&ii->i_btnode_cache);
+ ii->i_bmap = (struct nilfs_bmap *)&ii->i_bmap_union;
+ inode_init_once(&ii->vfs_inode);
+}
- err = nilfs_init_segbuf_cache();
- if (err)
- goto failed_transaction_cache;
+static void nilfs_segbuf_init_once(void *obj)
+{
+ memset(obj, 0, sizeof(struct nilfs_segment_buffer));
+}
- err = nilfs_btree_path_cache_init();
- if (err)
- goto failed_segbuf_cache;
+static void nilfs_destroy_cachep(void)
+{
+ if (nilfs_inode_cachep)
+ kmem_cache_destroy(nilfs_inode_cachep);
+ if (nilfs_transaction_cachep)
+ kmem_cache_destroy(nilfs_transaction_cachep);
+ if (nilfs_segbuf_cachep)
+ kmem_cache_destroy(nilfs_segbuf_cachep);
+ if (nilfs_btree_path_cache)
+ kmem_cache_destroy(nilfs_btree_path_cache);
+}
- err = register_filesystem(&nilfs_fs_type);
- if (err)
- goto failed_btree_path_cache;
+static int __init nilfs_init_cachep(void)
+{
+ nilfs_inode_cachep = kmem_cache_create("nilfs2_inode_cache",
+ sizeof(struct nilfs_inode_info), 0,
+ SLAB_RECLAIM_ACCOUNT, nilfs_inode_init_once);
+ if (!nilfs_inode_cachep)
+ goto fail;
+
+ nilfs_transaction_cachep = kmem_cache_create("nilfs2_transaction_cache",
+ sizeof(struct nilfs_transaction_info), 0,
+ SLAB_RECLAIM_ACCOUNT, NULL);
+ if (!nilfs_transaction_cachep)
+ goto fail;
+
+ nilfs_segbuf_cachep = kmem_cache_create("nilfs2_segbuf_cache",
+ sizeof(struct nilfs_segment_buffer), 0,
+ SLAB_RECLAIM_ACCOUNT, nilfs_segbuf_init_once);
+ if (!nilfs_segbuf_cachep)
+ goto fail;
+
+ nilfs_btree_path_cache = kmem_cache_create("nilfs2_btree_path_cache",
+ sizeof(struct nilfs_btree_path) * NILFS_BTREE_LEVEL_MAX,
+ 0, 0, NULL);
+ if (!nilfs_btree_path_cache)
+ goto fail;
return 0;
- failed_btree_path_cache:
- nilfs_btree_path_cache_destroy();
+fail:
+ nilfs_destroy_cachep();
+ return -ENOMEM;
+}
+
+static int __init init_nilfs_fs(void)
+{
+ int err;
- failed_segbuf_cache:
- nilfs_destroy_segbuf_cache();
+ err = nilfs_init_cachep();
+ if (err)
+ goto fail;
- failed_transaction_cache:
- nilfs_destroy_transaction_cache();
+ err = register_filesystem(&nilfs_fs_type);
+ if (err)
+ goto free_cachep;
- failed_inode_cache:
- nilfs_destroy_inode_cache();
+ return 0;
- failed:
+free_cachep:
+ nilfs_destroy_cachep();
+fail:
return err;
}
static void __exit exit_nilfs_fs(void)
{
- nilfs_destroy_segbuf_cache();
- nilfs_destroy_transaction_cache();
- nilfs_destroy_inode_cache();
- nilfs_btree_path_cache_destroy();
+ nilfs_destroy_cachep();
unregister_filesystem(&nilfs_fs_type);
}